As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR - DURING A-CHECK, AFT SERVICE DOOR'S EXIT SIGN FLOOR LEVEL FOUND INOPERABLE. LEFT AND RIGHT SIDES. REMOVED AND REPLACED POWER SUPPLY AND BATTERY PACK PER MM 33-50-22. OPS CHECK OK. POWER SUPPLY P/N ON 9005-42. P/N OFF 9005-42. S/N ON 19886. S/N OFF 8361. (X)